If you’re interested at all in this kind of thing, watch Flint’s fight with Joji next to one of the longer fighting lesson bits, and check out all the differences in how Flint is fighting. Formal patterns and attack/defend forms, one hand behind his back properly in the training, perfect lunge/retreat posture. When he fights for real, it’s absolutely nothing at all like that. He’s in a wide low stance with a permanent low guard and always checking behind and to the side. Parries are quick with a return to guard/attack and there’s nothing formal about it; it’s a frantic scramble of block-block-parry-strike-try to roll away. As is the case with most training vs. IRL fighting, to be honest, the training just teaches you the rules so you know how most effectively to use and/or break them. I love that Black Sails gets even tiny details like this SO VERY RIGHT.